JP2007201700A - Receiver - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To easily obtain an attached broadcast signal such as traffic information or the like from a broadcast station desired by a user in the case of background reception. <P>SOLUTION: The receiver 10 includes: a reception history storage memory 15 for storing a reception history by each broadcast station as reception history information; and a broadcast station selection means for selecting a broadcast station for the background reception to receive the attached base station signal in response to the reception history information stored in the reception history memory in the case of power-off or when an audio signal is reproduced from a source other than the broadcast station. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a receiving apparatus that receives a broadcast signal in which an additional broadcast signal such as traffic information is multiplexed, and more particularly, an additional broadcast required by a user during playback of a source other than the broadcast signal or when the power is turned off. The present invention relates to a receiving apparatus capable of acquiring a signal.

  In general, in broadcasting forms such as RDS (Radio Data System: Radio Data System) used in Europe, additional broadcast signals such as traffic information are multiplexed with FM radio broadcast signals. Further, this FM radio broadcast signal Is multiplexed with digital data (hereinafter referred to as RDS data). The RDS data includes, for example, a program (broadcast program) identification code (hereinafter referred to as a PI code) having a country identification code and a region code.

  Further, the RDS data includes a program type code (hereinafter referred to as a PTY code: a PTY code: an individual code for each of a plurality of genres such as classic, rock, popular, etc.) that identifies a program genre (broadcast program type). ), An alternative station frequency code (hereinafter referred to as AF code) for notifying other broadcast stations that broadcast the same program, and a broadcast station name code (hereinafter referred to as PS code) are included, and a PI code Is a 16-bit configuration, and a country code is assigned to the first 4 bits.

  The RDS data includes a traffic program (TP) identification code for identifying a broadcasting station that transmits traffic information (additional broadcast signal) together with FM radio broadcasting, and traffic information ( A traffic announcement (TA) code for identifying additional data) is also included, and a broadcast station that transmits an additional broadcast signal such as traffic information to the radio receiver (receiving device) using these TP identification code and TA code. Can be tuned to.

  In an audio apparatus provided with this type of radio receiver, traffic information is transmitted when an audio signal is reproduced from a source other than the radio receiver (for example, a CD player) or when the power is turned off. Broadcast stations (traffic broadcast capable stations) are monitored (that is, traffic broadcast capable stations are monitored and synchronized with the traffic broadcast capable stations) (background reception). Then, the TP identification code and the TA code are monitored, and if traffic information exists, the traffic information is automatically switched from another source to traffic information or the power is turned on to flow the traffic information.

  By the way, when a traffic broadcast capable station to be tuned at the time of background reception is selected, a technique such as tuning to the broadcast station that the radio receiver has received last is used. However, when the last received broadcast station is unnecessary for the user (for example, when the user broadcasts undesired), when the user switches to another source or is turned off, Therefore, a broadcast station that does not need to be selected is selected, and a user-desired broadcast station cannot be selected.

  In particular, in the case of background reception, the user tunes in Europe where there are many broadcasting stations, even though it is desirable that the station is capable of traffic broadcasting suitable for the region and language required by the user. In many cases, broadcast stations in other regions and other languages are selected, and when such other regions and other language broadcast stations are received last, this broadcast station receives in the background reception. Therefore, if there is an additional broadcast signal such as traffic information, traffic information in other regions and languages will be suddenly transmitted.

  RDS data received from each broadcasting station until a broadcasting station transmitting or capable of transmitting the TP identification code and the TA code is selected to select a broadcasting station desired by the user at the time of background reception. When searching for a broadcasting station that conducts traffic broadcasting by monitoring RDS data of the broadcasting station, the broadcasting station stored in the memory preset before scanning the frequency over the radio band in the search. (For example, refer to Patent Document 1).

Japanese Patent Laid-Open No. 11-150487 (pages 3 to 4, FIGS. 1 to 4)

  Since the conventional receiving apparatus is configured as described above, that is, a broadcast station that searches for RDS data for a broadcast station preset in advance by a user and transmits an additional broadcast signal such as traffic information during background reception. Therefore, there is a problem that the user has to preset a desired broadcast station in advance.

  Furthermore, even if a desired broadcast station is preset in the in-vehicle receiver, the preset broadcast station may not be useful when traveling across countries such as Europe. There is a problem that it is difficult to obtain additional broadcast signals such as traffic information.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a receiving apparatus that can easily obtain additional broadcast signals such as traffic information from a broadcast station desired by a user at the time of background reception. And

  The receiving apparatus according to the present invention includes a reception history storage means for storing a reception history for each broadcast station as reception history information, and a reception history when the power is off or an audio signal is reproduced from a source other than the broadcast station. Broadcast station tuning means for selecting a broadcast station that performs background reception in order to receive additional broadcast signals in accordance with reception history information stored in the storage means.

  As described above, according to the present invention, when the background reception is performed, the broadcast station for receiving the additional broadcast signal is selected according to the reception history information. There is an effect that an additional broadcast signal such as traffic information can be obtained from a broadcast station.

Embodiment 1 FIG.
Here, a description will be given of a device having a car radio receiver unit that receives FM radio broadcast by RDS and an audio source such as a CD player as a receiving device. In FIG. 1, a receiving apparatus 10 according to Embodiment 1 includes a tuner 11, a multiple data decoder 12, a processing unit 13, a reception history memory (reception history storage means) 14, and a receivable station memory (receivable station storage means) 15. , Operation unit 16, audio source (CD player or the like) 17, audio switching unit 18, speaker 19, and antenna 20, tuner 11, multiple data decoder 12, processing unit 13, reception history memory 14, and reception A car radio receiver unit is configured by the possible station memory 15.

  The tuner 11 receives a radio broadcast wave selected (tuned) by the processing unit 13 via the antenna 20. When receiving a radio broadcast wave, the tuner 11 converts the broadcast wave into an intermediate frequency (IF) signal, amplifies the IF signal, detects and demodulates the IF signal, and outputs it as a demodulated signal. Then, the demodulated signal is supplied to the audio switching unit 18 and the multiple data decoder 12.

  The multiplex data decoder 12 demodulates (decodes) the RDS data in the demodulated signal and supplies it to the processing unit 13. Then, the processing unit 13 performs switching control of the voice switching unit 18 according to the RDS data as will be described later.

  When the user selects either the receiver unit or the audio source 17 by the operation unit 16, the processing unit 13 controls the audio switching unit 18 to connect the speaker 19 to the tuner 11 or the audio source 17. When the receiver unit is selected, an audio signal related to the broadcast signal received by the tuner 11 is output as audio from the speaker 19, and when the audio source 17 is selected, the audio source 17 The audio signal reproduced in (1) is output from the speaker 19 as audio.

  Furthermore, when the receiver unit is selected, the processing unit 13 stores the broadcast station information related to the broadcast signal received by the channel selection operation of the operation unit 16 in the reception history memory 14 as reception history information. As a timing (storage timing) for storing the reception history information, for example, a time point when the frequency to be tuned is changed by a user's channel selection operation is used.

  Note that the time point when a broadcast station is selected by the TP search function provided in the processing unit 13 may be used as the above-described storage timing. Furthermore, the broadcast station information received immediately before switching to the audio source 17 or when the power is turned off is stored in the reception history memory 14. However, when viewing substantially the same broadcast program by AF change that searches for an alternative broadcast station using the AF code, even if the tuning frequency is changed, the processing unit 13 does not change the broadcast station information (the changed broadcast station). Information) is not stored in the reception history memory 14.

  In the reception history memory 14, as reception history information (broadcast station information), for example, reception order, broadcast frequency, PI code, AF code list, reception time, number of receptions, and reception factors (power on, source switching, Manual tuning, automatic tuning, preset call, or TP search) are stored.

  At this time, if broadcast station information having a reception time longer than a predetermined time is stored, carelessly selected broadcast station information is not stored in the reception history memory 14, and the reception history is stored. The memory capacity of the memory 14 can be used effectively. Further, when the number of broadcast station information stored in the reception history memory 14 reaches the maximum storage number, when the broadcast station information is newly stored in the reception memory 14 thereafter, the processing unit 13 stores the oldest broadcast station information. The new broadcast station information is deleted and stored in the reception history memory 14. The processing unit 13 stores in the receivable station memory 15 broadcast station information that can be received by the receiver unit as described later while the vehicle is traveling.

Next, the operation will be described.
The background reception will be described with reference to FIGS. 1 and 2. When the audio source 17 is selected or the power is turned off, the processing unit 13 starts the background reception (that is, the channel selection start). To do). First, the processing unit 13 searches the reception history memory 14 to determine the priority order and the number of effective stations for the broadcasting station (step ST1). For example, a broadcasting station having a long reception time and a large number of receptions is set as a broadcasting station having a high priority according to the reception time and the number of receptions for each broadcasting station, and a priority is assigned to each broadcasting station. That is, the broadcast station that the user normally watches has a higher priority because the reception time and the number of receptions are large, and the user-desired broadcast station is selected more frequently.

  Furthermore, if the reception factor is TP search, the channel is not selected by the user's operation, so the broadcast station is excluded from the effective stations. If the reception factor is a preset call, the broadcast station is frequently received by the user, so the priority may be increased. If the reception factor is manual channel selection or automatic channel selection, it is a broadcast station that has been received and watched by a user's operation, and therefore the priority may be increased.

  Subsequently, the processing unit 13 controls the tuner 11 to select the frequency of the highest-priority (first) broadcasting station (tuned: step ST2), and whether or not the broadcasting station is receivable. Is determined (step ST3). In step ST3, for example, the processing unit 13 determines whether or not a broadcast signal can be received with a predetermined reception field strength, and determines whether or not RDS data having the PI code of the broadcast station can be received. judge. If it is determined that reception is possible, the processing unit 13 selects the broadcast station as a discovery station (step ST4), and ends the channel selection.

  On the other hand, if the broadcasting station with the highest priority is not receivable, the processing unit 13 determines whether or not the processing has been completed for all valid stations in the reception history memory 14 (step ST5), and for all valid stations. If not completed, the frequency of the next highest priority broadcasting station is selected (tuned: step ST6), and the process returns to step ST3. In step ST5, when all the valid stations are completed, the processing unit 13 ends the channel selection.

  In this way, since broadcast stations having higher priority are sequentially selected according to the broadcast station information in the reception history memory 14 to find a receivable broadcast station, the user can easily perform reception in background reception. Traffic information can be obtained from a desired broadcast station.

  When receiving traffic information in the background, the processing unit 13 monitors whether the TP identification code or TA code (additional information code) in the RDS data is on in step ST3, and the TP identification code. When the TA code is OFF, the process proceeds to step ST5.

  Further, when it is determined in step ST3 that reception is not possible, it may be determined by referring to the AF code related to the broadcast station information whether the alternative broadcast station is receivable. In this way, it is possible to reliably receive the same broadcast as a high priority broadcast station. That is, it is possible to reliably receive a broadcast station with a high priority.

  Next, another example of background reception will be described. Referring to FIG. 1 and FIG. 3, when background reception is started, the processing unit 13 scans all the frequencies in the band (all broadcast frequencies), and therefore controls the tuner 11 to control all the frequencies in the band. The broadcast frequency is sequentially selected (tuned: step ST7). Then, the processing unit 13 determines whether or not each broadcast frequency can be received (step ST8). Here, the processing unit 13 determines whether or not a broadcast signal can be received with a predetermined reception electric field strength, and determines whether or not RDS data can be received.

  If reception is possible, the processing unit 13 stores the broadcast frequency, the received electric field strength of the broadcast frequency, and the PI code of the reception broadcast station related to the broadcast frequency in the receivable station memory 15 as receivable station information. (Step ST9), it is determined whether or not scanning has been completed for all frequencies in the band (step ST10). In step ST10, if scanning has not been completed for all frequencies in the band, the processing unit 13 controls the tuner 11 to select the next broadcast frequency in the band (step ST11), and returns to step ST8.

  If it is determined in step ST8 that reception is not possible, the processing unit 13 proceeds to step ST10. When receiving traffic information in the background, in step ST8, the processing unit 13 monitors whether the TP identification code or TA code in the RDS data is on, and the TP identification code and TA code are off. In some cases, the process proceeds to step ST10. Further, when there are a plurality of broadcast stations having the same PI code in step ST9, the processing unit 13 stores receivable station information in the receivable station memory 15 for the broadcast station related to the broadcast frequency with the highest received electric field strength. Remember.

  When it is determined in step ST10 that scanning has been completed for all frequencies in the band, the processing unit 13 determines the priority order and the number of effective stations for each broadcasting station according to the broadcasting station information stored in the reception history memory 14. (The same determination as in step ST1 described in FIG. 2 is performed), and the PI code related to the broadcasting station with the highest priority (first) broadcasting station is obtained as the history PI code from the reception history memory 14 (step ST12).

  Subsequently, the processing unit 13 searches the receivable station memory 15 for a receivable station (broadcast station) having the same PI code as the history PI code (step ST13), and the receivable station memory 15 has the same history PI code as the history PI code. It is determined whether there is a receivable station having the PI code (step ST14). When there is a receivable station having the same PI code as the history PI code in the receivable station memory 15, the processing unit 13 controls the tuner 11 to select the receivable station as a discovery station (step ST15). Exit the station.

  On the other hand, in step ST14, if there is no receivable station having the same PI code as the history PI code in the receivable station memory 15, the processing unit 13 determines whether all the valid stations in the reception history memory 14 have been completed. (Step ST16), if not all the valid stations have been completed, the processing unit 13 reads the PI code related to the broadcasting station with the next highest priority from the reception history memory 14 as a history PI code (step ST17). ). Then, the processing unit 13 proceeds to step ST13.

  On the other hand, when all the valid stations are completed in step ST16, the processing unit 13 selects any broadcast station from the receivable station information stored in the receivable station memory 15 (step ST18), and controls the tuner 11. The broadcast signal from the broadcast station is received in the background, and the channel selection is completed.

  When there is no receivable station having a history PI code in all valid stations, for example, the region code in the PI code may be masked and the search may be performed again. In this way, even when a broadcast station with a high priority cannot be received, there is a high possibility that an affiliated station of the broadcast station can be received. Further, when any one of the broadcast stations is selected from the receivable station information stored in the receivable station memory 15 in step ST18, the country code in the PI code of the high priority broadcast station in the reception history memory 14 and A matching PI code may be searched from the receivable station memory 15 to select a channel. In this way, it is possible to reduce the degree of receiving a broadcast station having a language different from that of the user's home country.

  In this way, the receivable broadcast stations are stored in the receivable memory, and the receivable stations are selected according to the reception history information stored in the reception history memory 14, so that the user's request can be received in the background reception. Traffic information can be obtained from other broadcast stations.

  Next, still another example of background reception will be described. Referring to FIGS. 1 and 4, the same steps as those shown in FIGS. 2 and 3 are denoted by the same reference numerals and description thereof is omitted. In the background reception shown in FIG. 2, when all the valid stations in the reception history memory 14 are finished in step ST5, the channel selection is completed. However, in the example shown in FIG. When the processing is completed, the processing unit 13 proceeds to step ST7 and continues the background reception processing.

  In this way, when all the valid stations are completed in step ST5, if the process proceeds to step ST7 and the process is continued, there is no broadcast station that can be received in the reception history memory 14. However, a newly receivable broadcast station can be found, and as a result, the probability that the user can acquire traffic information from a desired broadcast station in the background reception is increased.

  As is clear from the above description, the tuner 11, the multiple data decoder 12, and the processing unit 13 collectively function as broadcasting station channel selection means, and step ST1 corresponds to the priority determination function. Steps ST2, ST3, ST5, and ST6 correspond to the first receivability determination function, and step ST4 corresponds to the first channel selection function.

  Further, steps ST7 to ST11 correspond to the second receivability determination function, and step ST12 corresponds to the priority order determination function. Steps ST12 to ST14 and ST16 and ST17 correspond to the same broadcasting station determination function, and steps ST15 and ST18 correspond to the second channel selection function.

  As described above, according to the first embodiment, the priority order for each broadcast station is determined according to the reception history information stored in the reception history memory 14, and the broadcast stations that can be received in the order of priority are determined. And since it was comprised so that background reception might be performed about the broadcast station determined to be receivable initially, there exists an effect that background reception can be easily performed about a user desired broadcast station.

  According to the first embodiment, it is determined whether or not the alternative broadcast station indicated by the AF code is receivable, and is configured to receive background reception from the alternative broadcast station if it can be received. There is an effect that it is possible to reliably receive the same broadcast as a high-priority broadcast station.

  According to the first embodiment, the broadcast station information related to the broadcast frequency is stored in the receivable station memory 15 when it is sequentially scanned for all the broadcast frequencies in the band, and the reception history memory is in order of priority. 14 determines whether or not the same broadcast station (PI code) exists in the broadcast station (PI code) stored in the receivable station memory and the broadcast station stored in the receivable station memory, and determines that the same broadcast station exists. Therefore, it is possible to easily perform background reception for a broadcast station desired by the user.

  According to the first embodiment, when it is determined that the same broadcasting station (PI code) does not exist, background reception is performed for any one broadcasting station stored in the receivable station memory. Therefore, there is an effect that the background reception can be surely performed.

  According to the first embodiment, when it is determined that all of the broadcast stations stored in the reception history memory 14 are not receivable, it is determined that the broadcast station related to the broadcast frequency can be received by sequentially scanning all the broadcast frequencies in the band. Information is stored in the receivable station memory 15, and the same broadcast station (PI code) is stored in the broadcast station (PI code) stored in the reception history memory 14 and the broadcast station (PI code) stored in the receivable station memory in order of priority. ) Is determined, and background reception is performed for a broadcast station determined to have the same broadcast station. Therefore, it is possible to reliably perform background reception for a broadcast station desired by the user. There is an effect that can be done.

It is a block diagram which shows the structure of the receiver by Embodiment 1 of this invention. 3 is a flowchart for explaining an example of background reception in the receiving apparatus shown in FIG. 1. 6 is a flowchart for explaining another example of background reception in the receiving apparatus shown in FIG. 1. 6 is a flowchart for explaining still another example of background reception in the receiving apparatus shown in FIG. 1.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 Receiving device, 11 Tuner, 12 Multiple data decoder, 13 Processing unit, 14 Reception history memory, 15 Receivable station memory, 16 Operation unit, 17 Audio source (CD player etc.), 18 Audio switching unit, 19 Speaker, 20 Antenna .

Claims (9)

In a receiving apparatus that selects and receives a broadcast signal in which additional broadcast signals are selectively multiplexed from a plurality of broadcast stations,
Reception history storage means for storing the reception history for each broadcast station as reception history information;
When the power is off or an audio signal is being reproduced from a source other than the broadcast station, background reception is performed to receive the additional broadcast signal according to the reception history information stored in the reception history storage means. A receiving apparatus comprising: a broadcasting station tuning means for selecting a broadcasting station to perform. The reception history storage means stores at least the reception time and the number of receptions for each broadcasting station as reception history information,
The broadcasting station tuning means includes a priority determining function for determining the priority for each broadcasting station according to the reception history information,
A first receivability determination function for determining whether or not a broadcast signal from the broadcast station is receivable in the order of priority;
The receiving apparatus according to claim 1, further comprising: a first channel selection function that performs background reception for a broadcast station that is first determined to be receivable by the first reception determination function. When the additional broadcast signal is multiplexed with the broadcast signal, a predefined additional information code is transmitted,
3. The receiving apparatus according to claim 2, wherein the first receivability determining function determines that the broadcast signal from the broadcast station cannot be received when the additional information code is off. In the reception history storage means, the broadcast frequency of the broadcast station that broadcasts the same broadcast program in association with each broadcast station as reception history information is stored as an alternative frequency code,
When it is determined that the broadcast signal from one broadcast station is not receivable, the receivability determination function searches the reception history storage means and can receive the alternative broadcast station indicated by the alternative frequency code related to the broadcast station. 4. The receiving apparatus according to claim 2, wherein it is determined whether or not there is any. Receivable station storage means for storing information about broadcast stations that can receive broadcast signals as receivable broadcast station information,
The reception history storage means stores at least the reception time and the number of receptions for each broadcasting station as reception history information,
When performing background reception, the broadcast station channel selection means sequentially scans all broadcast frequencies, determines whether or not each broadcast frequency can be received, and determines that the broadcast station associated with the broadcast frequency is capable of receiving. A second receivability determination function for storing information in the receivable storage means as the receivable broadcast station information;
A priority determination function for determining the priority for each broadcasting station according to the reception history information stored in the reception history storage means;
The same broadcast station determination function for determining whether or not the same broadcast station exists in the broadcast stations stored in the reception history storage means and the broadcast stations stored in the receivable station storage means in the order of priority; ,
The receiving apparatus according to claim 1, further comprising: a second channel selection function for performing background reception for a broadcasting station that is initially determined by the same broadcasting station determination unit to have the same broadcasting station. The broadcast signal is provided with a broadcast program identification code,
Each of the reception history information and receivable broadcast station information includes the broadcast program identification code,
The same broadcast station determination means determines that the same broadcast station exists when the broadcast program identification code stored in the reception history storage means and the broadcast program identification code stored in the receivable station storage means are the same. The receiving apparatus according to claim 5.   The second channel selection function performs background reception for any one of the broadcast stations stored in the receivable station storage unit when the same broadcast station determination unit determines that the same broadcast station does not exist. The receiving apparatus according to claim 5, wherein When the additional broadcast signal is multiplexed with the broadcast signal, a predefined additional information code is transmitted,
The second receivability determination function determines that a broadcast signal from the broadcast station cannot be received when the additional information code is off. The receiving device according to claim 1. The reception history storage means stores at least the reception time and the number of receptions for each broadcasting station as reception history information,
Receivable station storage means for storing information about broadcast stations that can receive broadcast signals as receivable broadcast station information,
When the first station receivability determination function determines that all of the broadcast stations stored in the reception history storage unit are not receivable, the broadcast station selection unit can sequentially scan all broadcast frequencies and receive each broadcast frequency. A second receivability determination function for storing the broadcast station information related to the broadcast frequency in the receivable storage means as the receivable broadcast station information when it is receivable;
A priority determination function for determining the priority for each broadcasting station according to the reception history information stored in the reception history storage means;
The same broadcast station determination function for determining whether or not the same broadcast station exists in the broadcast stations stored in the reception history storage means and the broadcast stations stored in the receivable station storage means in the order of priority; ,
3. The receiving apparatus according to claim 2, further comprising: a second channel selection function that performs background reception on a broadcasting station that is initially determined to have the same broadcasting station by the same broadcasting station determination unit.

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